Finding the Fourth Proportional to 2,462.61, 3,693.20 and 818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,462.61 : 3,693.20 = 818.72 : x
2. Step 2: Convert to fraction form
   2,462.61/3,693.20 = 818.72/x
3. Step 3: Cross multiply
   2,462.61x = 3,693.20 × 818.72
4. Step 4: Simplify right side
   2,462.61x = 3,023,674.14
5. Step 5: Solve for x
   x = 3,023,674.14/2,462.61
6. Step 6: Final answer
   x = 1,227.83